Air-bound hydronic heat system-help!

mclain-man

I have a relatively new Weil McLain Gold GV Series 3 gas-fired boiler w/ a Superstore domestic water heater installed in 2001 and located in the basement. The system is a 2 zone (1st and 2nd floor) with Taco 007 circulators and 1" copper pipe is used throughout. There is a Honeywell air eliminator at the 30PSI expansion tank. Baseboard units are used on the living spaces. This heating season,the system has become air bound and I have had to bleed the lines every other day. I have had numerous site visits from 2 different HVAC contractors and we can't seem to find the problem. Even the Weil McLain field rep couldn't figure it out. There are no leaks in the pipes, there are no automatic valves on the system, the coin valves at the baseboard units are all closed tightly, and I have a high quality air eliminator at the expansion tank. Any input would be extremely helpful--Thanks!

mclain-man

Air-bound hydronic heat system--no heat!

I have a relatively new Weil McLain Gold GV Series 3 gas-fired boiler w/ a Superstore domestic water heater installed in 2001 and located in the basement. The system is a 2 zone (1st and 2nd floor) with Taco 007 circulators and 1" copper pipe is used throughout. There is a Honeywell air eliminator at the 30PSI expansion tank. Baseboard units are used on the living spaces. This heating season,the system has become air bound and I have had to bleed the lines every other day. I have had numerous site visits from 2 different HVAC contractors and we can't seem to fix the problem. Even the Weil McLain field rep couldn't figure it out. There are no leaks in the pipes, there are no automatic valves on the system, the coin valves at the baseboard units are all closed tightly, and I have a high quality air eliminator at the expansion tank. Any input would be extremely helpful--Thanks!

ScottMP

Explain

What you mean by a 30PSI expansion tank ?

Is that the preasure in the system ?

What is the high limit on the boiler set at ?

Scott

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mclain-man

The 30 PSI rating refers to the maximum capacity for the expansion tank. The normal reading on the boiler gage is 180 degrees F. and 20 PSI limit.

Any ideas?

Thanks much!

Uni R

Any way to get pictures?

They are worth about a million words here.

mclain-man

I will take some pictures and post them on Monday (after I borrow a digital camera)

Thanks

clammy

water lose?

Do a quick test and shut your water feed to the boiler off and run your heat both zones see if your pressure gauge on the boiler decreases .Do any of your heat loops run under the slab or under the concrete of your home ? If so you may be losing water there and your feeder is making it up as the fresh water is making up the air in it is ending up in your 2 nd floor baseboard i have seen this a few times and it has always been something i check on repeat air asscioted promblems ,while other techs have not noticed it or just bleed it and split instead of doing a little investagation and may be spend a little bit more time but on some calls you don't have that luxury .good luck peace clammy

mclain-man

Clammy--There are no heating pipes under the slab. Also, my HVAC contractor did not put a shut off valve at the water feed line so I can't shut it down (unless there is another way to shut it off).

Thanks

Weezbo

quite likely you dont have a backflow or check either...

put your hand on the feed water line ifit is even remotely hot ,....your water is slippin into darkness and you are drinking boiler water ,albiet diluted.

Sweet_2

Weezbo

NICE!!

mclain-man

Oops, I was mistaken....of course there is a shut off (and a backflow preventor as well). It would have helped if I verified it first before my previous reply....oh well! At least I'm not drinking boiler water, although it would save me from heating up my coffee in the morning!